Passing Two items in a ViewModel's constructor in Catel

Question

Can a UserControl's ViewModel constructor be set up to fire with the view's DataContext AND another dependency injection?

I would like to be able to get the UserControl's datacontext (set in it's parent's veiw) and a database service into a ViewModel.

Can't figure this out:

public MyUserControlViewModel( theDataContext, InvoiceService)
{

}

This works:

public MyUserControlViewModel( theDataContext)
{

}

This works:

 public MyUserControlViewModel( InvoiceService)
 {

 }

score 1 · Accepted Answer · answered Apr 20 '14 at 20:45

1

Yes, Catel supports of all this. In the case that you have above, all should work. For example:

public MyViewModel(Model model, IService1 service1, IService2 service2) { }

Note that in order to inject a model, it must be set as data context. All services except for the model must be registered in the ServiceLocator.

answered Apr 20 '14 at 20:45

Geert van Horrik

I can inject multiple services (iservice1 service1, iservice2 service2), or a Model in the view's DataContext (Model model), but it breaks when I mix them: (Model model, IService1 service1, IService2 service2). I'll try to isolate things to see if that is really what's going on, or if something else is breaking things. – Johnny Beatniks Apr 20 '14 at 20:55
I built a test app and the injection indeed breaks when combining the DataContext and a service, but works separately. – Johnny Beatniks Apr 20 '14 at 23:46
I have 3.5 on one computer and I'm pretty sure 3.9 on another. – Johnny Beatniks Apr 20 '14 at 23:47
1

The error did not reproduce itself in small test app in Catel 3.9 Version. – Johnny Beatniks Apr 21 '14 at 01:49
Yes, upgrade fixed other machines. – Johnny Beatniks Apr 21 '14 at 02:02

1 Answers1